sata_sil24: separate out sil24_do_softreset()

Separate out sil24_do_softreset() which takes @pmp as its last
argument.  This will be used to implement sil24_pmp_softreset().

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

drivers/ata/sata_sil24.c

@@ -578,8 +578,8 @@ static int sil24_exec_polled_cmd(struct ata_port *ap, int pmp,
 	return rc;
 }
 
-static int sil24_softreset(struct ata_port *ap, unsigned int *class,
-			   unsigned long deadline)
+static int sil24_do_softreset(struct ata_port *ap, unsigned int *class,
+			      int pmp, unsigned long deadline)
 {
 	unsigned long timeout_msec = 0;
 	struct ata_taskfile tf;
@@ -605,7 +605,8 @@ static int sil24_softreset(struct ata_port *ap, unsigned int *class,
 		timeout_msec = jiffies_to_msecs(deadline - jiffies);
 
 	ata_tf_init(ap->device, &tf);	/* doesn't really matter */
-	rc = sil24_exec_polled_cmd(ap, 0, &tf, 0, PRB_CTRL_SRST, timeout_msec);
+	rc = sil24_exec_polled_cmd(ap, pmp, &tf, 0, PRB_CTRL_SRST,
+				   timeout_msec);
 	if (rc == -EBUSY) {
 		reason = "timeout";
 		goto err;
@@ -629,6 +630,12 @@ static int sil24_softreset(struct ata_port *ap, unsigned int *class,
 	return -EIO;
 }
 
+static int sil24_softreset(struct ata_port *ap, unsigned int *class,
+			   unsigned long deadline)
+{
+	return sil24_do_softreset(ap, class, 0, deadline);
+}
+
 static int sil24_hardreset(struct ata_port *ap, unsigned int *class,
 			   unsigned long deadline)
 {